.header {
	height: 50px;
	background: black;
	color: #fff;
	text-align: center;
}

.header>h1 {
	line-height: 50xp;
	font-size: 300%;
}

.footer {
	height: 50px;
	background: black;
	color: #fff;
	text-align: center;
	position: absolute;
	bottom: 0;
	width: 100%;
}

.article {
	position: absolute;
	top: 50px;
	bottom: 50px;
	left: 0;
	width: 100%;
}

.menu {
	width: 200px;
	position: absolute;
	height: 100%;
	left: 0;
	top: 0;
	border-right: 1px solid #999;
	margin: 0;
	padding: 0;
	text-align: center;
}

.main {
	display: block;
	margin-left: 201px;
	height: 100%;
}

.main>iframe {
	width: 100%;
	height: 100%;
	display: block;
}